<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="https://unpkg.com/github-markdown-css" />
    <style>
      .markdown-body {
        width: 90%;
        max-width: 800px;
        margin: 0 auto;
        padding: 20px 0;
      }
    </style>
  </head>
  <body class="markdown-body">
    ${htmlContent}
  </body>
</html>
